وهو حد الإعجاز
And that is the limit of inimitability.
Balagha is not presented as a single undifferentiated degree. It has upper and lower ranges. The upper limit is associated with a level beyond human successful rivalry. The lower limit is the threshold below which discourse ceases to qualify as baligh.
These categories rank rhetorical attainment; they do not imply that every attractive style or polished sentence is miraculous.